root@jonah [~]# /usr/sbin/smartctl -q errorsonly -H -l selftest -l error /dev/sda 
Please note the following marginal Attributes:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
190 Unknown_Attribute       0x0022   076   044   045    Old_age   Always   In_the_past 24

root@jonah [~]# /usr/sbin/smartctl -q errorsonly -H -l selftest -l error /dev/sdb
Please note the following marginal Attributes:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
190 Unknown_Attribute       0x0022   068   043   045    Old_age   Always   In_the_past 32